Two mirrors meet at right angles. A ray of light is incident on one at an angle of 30° as shown in Fig. 16.19. Draw the reflected ray from the second mirror.


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The final figure after reflection would look like Let’s see how we get it Explanation The incident ray OA reflects at point O Since Angle of Reflection = Angle of Incidence OO’ makes angle 30° with normal of first mirror Now, drawing Normal at O’ The two normals intersect at 90° angle And applying angle sum property in ΔOXO’ We get Angle of Incidence in 2nd mirror = 60° Applying law of reflection in 2nd mirror, We get the below figure

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo